<script lang="ts" setup>
import useStore from '@/store'
import { useIntersectionObserver } from '@vueuse/core';
import { ref } from 'vue';
import HomePanel from './HomePanel.vue'
import { useLazyData } from '@/utils/hooks'
const { home } = useStore()

const target = useLazyData(() => {
  home.getNewList()
})

/* const target = ref(null)
// 当整个区块处于可见状态时, 才发ajax
const { stop } = useIntersectionObserver(target, ([{ isIntersecting }]) => {
  console.log('新鲜好物', isIntersecting)
  // 可见
  if (isIntersecting) {
    // 发请求
    home.getNewList()
    // 停止监听
    stop()
  }
})
 */

</script>

<template>
  <div class="home-new" ref="target">
    <HomePanel title="新鲜好物" sub-title="新鲜出炉 品质靠谱">
      <template #right>
        <XtxMore path="/" />
      </template>

      <Transition name="fade">
        <!-- 面板内容 -->
      <ul class="goods-list" v-if="home.newGoodList.length > 0">
        <li v-for="item in home.newGoodList" :key="item.id">
          <RouterLink :to="'/product/'+item.id">
            <img v-lazy="item.picture" alt="" />
            <p class="name ellipsis">{{ item.name }}</p>
            <p class="price">&yen;{{ item.price }}</p>
          </RouterLink>
        </li>
      </ul>


      <div class="home-skeleton" v-else>
        <div class="item" v-for="i in 4" :key="i" :style="{ backgroundColor: '#f0f9f4' }">
          <XtxSkeleton bg="#e4e4e4" :width="306" :height="306" animated fade/>
          <XtxSkeleton bg="#e4e4e4" :width="160" :height="24" animated fade/>
          <XtxSkeleton bg="#e4e4e4" :width="120" :height="24" animated fade/>
        </div>
      </div>
      </Transition>

      
    </HomePanel>
  </div>
</template>

<style scoped lang="less">
// fade-enter-active: 从无到有(不可见 -> 可见)
// fade-leave-active: 从有到无(可见 -> 不可见)
.fade-enter-active, .fade-leave-active {
  transition: all 5s
}
/* 
从无到有: 他是动画的起点
         终点是 fade-leave-to 设置的值
         但是这个类没有设置,所以终点是默认值
*/
.fade-enter-form {
   opacity: 0
}
/* 
从有到无: 他是动画的终点
         起点是 fade-enter-form 设置的值
         但是这个类没有设置,所以起点是默认值
*/
.fade-leave-to {
   opacity: 0
}
.home-skeleton {
  width: 1240px;
  height: 406px;
  display: flex;
  justify-content: space-between;
  .item {
    width: 306px;
    .xtx-skeleton ~ .xtx-skeleton {
      display: block;
      margin: 16px auto 0;
    }
  }
}
.goods-list {
  display: flex;
  justify-content: space-between;
  height: 406px;

  li {
    width: 306px;
    height: 406px;
    background: #f0f9f4;
    .hoverShadow();

    img {
      width: 306px;
      height: 306px;
    }

    p {
      font-size: 22px;
      padding: 12px 30px 0 30px;
      text-align: center;
    }

    .price {
      color: @priceColor;
    }
  }
}
</style>